1   /**
2    * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved.
3    *
4    *
5    *
6    *
7    * The contents of this file are subject to the terms of the Liferay Enterprise
8    * Subscription License ("License"). You may not use this file except in
9    * compliance with the License. You can obtain a copy of the License by
10   * contacting Liferay, Inc. See the License for the specific language governing
11   * permissions and limitations under the License, including but not limited to
12   * distribution rights of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.util;
24  
25  import com.liferay.portal.kernel.util.StringUtil;
26  import com.liferay.portal.kernel.util.Validator;
27  
28  /**
29   * <a href="PwdGenerator.java.html"><b><i>View Source</i></b></a>
30   *
31   * @author Brian Wing Shun Chan
32   * @author Amos Fong
33   */
34  public class PwdGenerator {
35  
36      public static String KEY1 = "0123456789";
37  
38      public static String KEY2 = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
39  
40      public static String KEY3 = "abcdefghijklmnopqrstuvwxyz";
41  
42      public static String getPinNumber() {
43          return _getPassword(KEY1, 4, true);
44      }
45  
46      public static String getPassword() {
47          return getPassword(8);
48      }
49  
50      public static String getPassword(int length) {
51          return _getPassword(KEY1 + KEY2 + KEY3, length, true);
52      }
53  
54      public static String getPassword(String key, int length) {
55          return getPassword(key, length, true);
56      }
57  
58      public static String getPassword(
59          String key, int length, boolean useAllKeys) {
60  
61          return _getPassword(key, length, useAllKeys);
62      }
63  
64      private static String _getPassword(
65          String key, int length, boolean useAllKeys) {
66  
67          StringBuilder sb = new StringBuilder();
68  
69          for (int i = 0; i < length; i++) {
70              sb.append(key.charAt((int)(Math.random() * key.length())));
71          }
72  
73          String password = sb.toString();
74  
75          if (!useAllKeys) {
76              return password;
77          }
78  
79          boolean invalidPassword = false;
80  
81          if (key.contains(KEY1)) {
82              if (Validator.isNull(StringUtil.extractDigits(password))) {
83                  invalidPassword = true;
84              }
85          }
86  
87          if (key.contains(KEY2)) {
88              if (password.equals(password.toLowerCase())) {
89                  invalidPassword = true;
90              }
91          }
92  
93          if (key.contains(KEY3)) {
94              if (password.equals(password.toUpperCase())) {
95                  invalidPassword = true;
96              }
97          }
98  
99          if (invalidPassword) {
100             return _getPassword(key, length, useAllKeys);
101         }
102 
103         return password;
104     }
105 
106 }